The alternator in your Nissan Hardbody creates electricity from the drive belt of the engine, and transfers that energy to the electrical system in the vehicle, including the battery. If it goes out, your battery will eventually drain, and then you’ll have to replace both the alternator and the battery. Fortunately, swapping out the alternator on your Hardbody isn’t very difficult, and can be done at home with basic tools.
Tools Used: Tools, Replacement alternator, 3/8-inch ratchet and socket set, Open-end wrench set
Change the Alternator
Pop the hood and disconnect the positive terminal from the battery using an open-end wrench.